package main

import "fmt"
func main() { //ssdt1.dat
  const PORT = 3000
  const (
    //ioat ,used in const keyword
    b,beijing = 10*iota+1, 100*iota+100 //0
    s,shenzhen //auto add 1
    s2,shanghai
  )
  fmt.Println(beijing,shenzhen,shanghai)
  fmt.Println(b,s,s2)
}
